his father ricardo was found bludgeoned to death in this home last saturday. that's the last time anyone saw frederick. the owner of the home is cindy tran. she's valdamaro's girlfriend. he felt one of them might be involved with tran. police also think valdamaro's strangled his girlfriend before he was shot to death in a confrontation with police tuesday night. now four days later, investigators still need answers. they're hoping to find them here. 15 search and rescue volunteers and one cadaver dog are sifting through debris inch by inch. >> you have to search, you know, small areas at one time. with the dog it is very difficult because there are very many different scents. >> the only other place police have to turn is here. the solano county lockup is where charles rittenhouse is. the 72-year-old used to stay with rittenhouse and his wife allen. police found allen and her friend smart dead tuesday. right now rittenhouse is charged only with having large amounts of explosives in the house. his attorney says rittenhouse isn't involved with any murders. >> i